Combined oil and gas burner



Nov. 19, 1929. R. C(HOPKINS COMBINED OIL AND GAS BURNER Filed June 15, 1927 2 Shee'ts-Shet gwumto a NW. 19,- 1929. 9 R. c. HOPKINS 1,736,345

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Patented Nov. 19, 1929 UNITED STATES ROBERT C. HOPKINS,

OF ALLIANCE, OHIO COMBINED OIL AND GAS BURNER Application filed June 13,

This invention relates to burners and more particularly to a combined oiland gas burner. The object of the improvement is to provide a burner in which both gas and oil may 3 be simultaneously burned or either of said fuels may be burned separately, to provide for a sandwich effect whereby the oil is introduced at the center of the flame and the gas in an annular sheet surrounding the atomizing oil; to provide means for quickly atomizs ing the oil in which the oil and a blast of air are admitted to the jet of the burner in a swirling motion and in opposite directions; and to generally simplify and improve 1 burners of this type.

An embodiment of the invention is illustrated in the accompanying drawings, in which Figure 1 is a longitudinal sectional view through the improved burner;

Fig. 2, an end view of the same; Fig. 3, a section on the line 3-3, Fig. 1, and

Fig. 4, a detail perspective View of the slotted disk which produces the whirling motion of the air blast.

Similar numerals refer to similar parts throughout the drawings.

The burner comprises the hollow T-shaped casting 1 communicating at one end with the nozzle portion indicated generally at 2. The opposite end of the casting may be closed as by the head 3 connected to the annular flange 4 upon the casting as by screws 5 or the like. Anoair blast is admitted to the interior of the casting as by the pipe 6 communicating with the threaded nipple 7, in one side of the casting, the pipe 6 being connected to any suitable supply of air under pressure.

The outer end of the nozzle casing 2 may be provided with the annular flange 8 to which is connected, as by screws 9, the ring plate 10 provided with the beveled central opening 11.

The tip of the burner comprises the inner and outer concentric necks 12 and 13 respec tively, concentrically mounted through the central opening 11 of the ring plate 10. These sleeves may be formed in a single castingprovided with the annular gas chamber 1927. Serial No. 198,540.

14., surrounding the inner end portion of the inner sleeve and communicating with the radially disposed inlet neck 15, extended through one side of the nozzle casing 2 andcommunicating with the gas inlet pipe 16. The inner end portion of the inner sleeve 12 may be flared as shown at 17, forming an annular seat 18 for the slot-ted disk 19.

This disk has the central threaded opening 20 in which is located the nipple 21, extending longitudinally through the inner end portion of the inner neck 12 and terminating at a point spaced from the outer end thereof.

The inner neck 12 is provided with a tan gential inlet passage 22 extending through the annular chamber 14 and communicating with an oil inlet pipe 23. a

The slotted disk 19 is provided with the angular slots 24 arranged to direct the air blast through the inner neck 12 in a swirling motion and in the same direction as the incoming oil, tending to quickly break up and atomize the oil, while a straight blast of air is admitted through the central nipple 21 to carry the atomized oil out of the burnerjet.

In order to control the amount of air passing through the openin in the ring plate 10, around the outer neck 13, a flame regulating ring valve 25 is slidably mounted upon the outer neck and arranged to entirely close the opening 11 or to be set at any distance therefrom. A series of apertures 25 may be provided in this ring valve to provide for a straight blast of air through the same, even when the valveis closed. 1

This ring valve is carried by the yoke 26 having the threaded boss 27 connected to the threaded inner extremity of the rod 28 which is slidably mounted through the blast gate 29 and through the central boss 30 of the end plate 3, a knob 31 being fixedupon the outer end of this red for manually operating the same.

The blast gate 29 is thus slidably mounted upon the rod 28 and arranged to control the admission of air to the nozzle casing.

A rod 32 is connected to this blast gate and slidably locatedthroughthe boss 33, in the end plate 3, being provided with a handle 34 1 for operating the same and a set screw 35 for holding the blast gate in adjusted position.

WVhen oil is used for fuel the oil is admitted through the pipe 23 and flows down into the atomizing chamber, within the sleeve 12 where it is met by the current of air with a spinning motion, caused by the slotted disk 19.

This spinning or whirling motion of the.

air throws the oil against the inner surface of the neck 12, causing it to pass from the jet in a thin film. The air blast from the ring 10 is projected outward at an angle to the axis of the burner, this air current crossing and impinging on the oil film as it is projected from the atomizing chamber, the atomization and mixing of the oil with the air being thus accomplished. The amount of air required for the combustion of the oil is controlled by the adjusting of the ring disk or flame adjuster 25.

If gas also is to be used for fuel, the gas is admitted to the annular chamber between the necks 12 and 13 and passes out of the burner et where it is met by the cross current of air from the ring plate 10. The gas stream as it passes from the burner has the swirling air current, from the sleeve 12, passing through its center.

This swirling stream of air is, of course, mixed with the atomized oil as above described and what might be termed a sand wich effect is produced, the swirling current of air and oil being surrounded by the gas stream across which the outer air blast is projected, whereby the gas is brought more quickly into an intimate contact, insuring proper mixture for combustion.

Where the oil and gas are used simultaneously it is only necessary to supply the proper amounts of oil and gas so that the combined fuel will not be in excess of the air supply for mixing therewith and supporting combustion without loss.

I claim:

1. A burner including a casing, an atomizing chamber located within the casing, a gas chamber surrounding the atomizing chamber, means for admittin fluid fuel to the atomizing chamber, means for producing a whirl ing air current through the atomizing chamber, means for producing an air blast axially through the atomizing chamber, and means for discharging gas from the gas chamber around the mixture discharged from the atomizing chamber.

2. A burner including a casing, an atomizing chamber located within the casing, means for admitting fluid fuel to the atomizing chamber, means for producing a whirling 7 air current through the atomizing chamber,

means for discharging air under pressure from the casing around the atomizing chamber and means for producing an air blast axially through the atomizing chamber.

3. A burner including a casing, an atomizing chamber located within the casing, means for admitting fluid fuel to the atomizing chamber, a slotted disk for producing a whirling air current through the atomizing chamber and means for discharging air under pressure from the casing around the atomizing chamber. 7

4. A burner including a casing, an atomizing chamber located within the casing, a gas chamber surrounding the atomizing chamber, means for admitting fluid fuel to the atomizing chamber, a slotted disk for producing a whirling air current through the atomizing chamber, means for producing an air blast axially through the atomizing cham ber, and means for discharging gas from the gas chamber around the mixture discharged from the atomizing chamber.

5. A burner including a casing, an atomizing chamber located within the casing, means for admitting fluid fuel to the atomizing chamber, a slotted disk for producing a whirling air current through the atomizing cham ber, means for discharging air under pressure from the casing around the atomizing chamber and means for producing an air blast axially through the atomizing chamber.

' 6. A burner including a casing, an atomizing chamber within the casing and terminating in a neck, a gas chamber surrounding the atomizing chamber and terminating ina neck surrounding the first named neck and means for producing an air blast through the inner neck, and around the outer neck.

7 A burner including a casing, an atomizing chamber within the casing and terminating in a neck, a gas chamber surrounding the atomizing chamber and terminating in a neck surrounding the first named neck and means for producing an air blast through the inner neck,-and around the outer neck, and across the path of the air blast from the inner neck.

8. A burner including a casing, an atomizing chamber located within the casing, means for admitting liquid fuel to the atomizing chamber, an angularly slotted disk at the inner end of the atomizing chamber, a gas chamber surrounding the atomizing chamber, a tapered opening in the nozzle end of the casing, spaced, concentric necks upon the atomizing chamber and gas chamberextended into said opening, and means for passing an air'blast through the casing.

9. A burner including a casing, an atomizing chamber located within the casing, means for admitting liquid fuel to the atomizing chamber, an angularly slotted disk at the inner end of the atomizing chamber, a nipple in the center of said slotted disk extended into the atomizing chamber, a gas chamber surrounding the atomizing chamber, a tapered opening in the nozzle end of the casing, spacedconc-entric necks upon theatomizi-ng chamber and gas chamber extended into said opening, and means for passing an air blast through the casing.

10. A burner including a casing, an atomizing chamber within the casing and terminating in a neck, a as chamber surrounding the atomizing cham er and terminating in a neck surrounding the first named neck, means for producing an air blast through the inner neck and around the outer neck, and a perforated, flame regulating ring Valve slidably mounted upon the outer neck.

In testimony that I claim the above, I have hereunto subscribed my name.

ROBERT C. HOPKINS, 

